Neck channel of phage 812 after tail contraction (C1)

Genome anchoring, retention, and release by neck proteins of Herelleviridae phage 812

B-A-B-form dsDNA model was generated with Web 3DNA 2.0. Portal and neck dodecamers were sourced from models refined in C12 symmetry. All input models were fitted into the asymmetric map. Tunnel loops of the portal were extended into the asymmetric density.

Purified phage virion was incubated in urea and LTA to induce tail contraction and genome ejection

Frame alignment and dose-weighting with MotionCor2, then contrast inversion and normalization

Particle selection using cross-correlation against capsid template

MVNSMFGGDLDPYEKSLNYEYPYHPSGNPKHIDVSEIDNLTLADYGWSPDAVKAYMFGIVVQNPDTGQPMGDEFYNHILE
RAVGKAERALDISILPDTQHEMRDYHETEFNSYMFVHAYRKPILQVENLQLQFNGRPIYKYPANWWKVEHLAGHVQLFPT
ALMQTGQSMSYDAVFNGYPQLAGVYPPSGATFAPQMIRLEYVSGMLPRKKAGRNKPWEMPPELEQLVIKYALKEIYQVWG
NLIIGAGIANKTLEVDGITETIGTTQSAMYGGASAQILQINEDIKELLDGLRAYFGYNMIGL

MADLFKQFRLGKDYGNNSTIAQVPIDEGLQANIKKIEQDNKEYQDLTKSLYGQQQAYAEPFIEMMDTNPEFRDKRSYMKN
EHNLHDVLKKFGNNPILNAIILTRSNQVAMYCQPARYSEKGLGFEVRLRDLDAEPGRKEKEEMKRIEDFIVNTGKDKDVD
RDSFQTFCKKIVRDTYIYDQVNFEKVFNKNNKTKLEKFIAVDPSTIFYATDKKGKIIKGGKRFVQVVDKRVVASFTSREL
AMGIRNPRTELSSSGYGLSEVEIAMKEFIAYNNTESFNDRFFSHGGTTRGILQIRSDQQQSQHALENFKREWKSSLSGIN
GSWQIPVVMADDIKFVNMTPTANDMQFEKWLNYLINIISALYGIDPAEIGFPNRGGATGSKGGSTLNEADPGKKQQQSQN
KGLQPLLRFIEDLVNRHIISEYGDKYTFQFVGGDTKSATDKLNILKLETQIFKTVNEAREEQGKKPIEGGDIILDASFLQ
GTAQLQQDKQYNDGKQKERLQMMMSLLEGDNDDSEEGQSTDSSNDDKEIGTDAQIKGDDNVYRTQTSNKGQGRKGEKSSD
FKH

(DG)(DA)(DT)(DA)(DG)(DA)(DA)(DT)(DT)(DA)(DT)(DT)(DG)(DG)(DT)(DA)(DC)(DC)(DG)(DT)
(DT)(DG)(DT)(DC)(DT)(DT)(DC)(DT)(DA)(DA)(DT)(DC)(DT)(DA)(DC)(DT)(DC)(DT)(DC)(DA)
(DG)(DT)(DA)(DG)(DT)(DA)(DG)(DT)(DA)(DA)(DT)(DA)(DG)(DT)(DA)(DG)(DT)(DA)(DC)(DA)
(DT)(DA)(DA)

(DT)(DT)(DA)(DT)(DG)(DT)(DA)(DC)(DT)(DA)(DC)(DT)(DA)(DT)(DT)(DA)(DC)(DT)(DA)(DC)
(DT)(DA)(DC)(DT)(DG)(DA)(DG)(DA)(DG)(DT)(DA)(DG)(DA)(DT)(DT)(DA)(DG)(DA)(DA)(DG)
(DA)(DC)(DA)(DA)(DC)(DG)(DG)(DT)(DA)(DC)(DC)(DA)(DA)(DT)(DA)(DA)(DT)(DT)(DC)(DT)
(DA)(DT)(DC)

Ministry of Education, Youth and Sports of the Czech Republic

phage, neck, A-form DNA, connector, VIRUS